KR20060043948A - Car audio device with trip computing and tire pressure keeping capability - Google Patents

Abstract

The present invention relates to a car audio device having trip computing and tire pressure management functions, the car audio device performing control of the car audio device and outputting display information, a display unit for displaying the display information output from the micom; A wireless receiver configured to wirelessly receive tire pressure from the tire pressure detector, a trip computing and tire pressure manager configured to generate vehicle state information based on state data collected from the CAN network and tire pressure received from the wireless receiver; And a controller configured to combine vehicle state information output from the trip computing and tire pressure management unit with display information output from the microcomputer and to provide the display unit, and vehicle state output from the trip computing and tire pressure management unit. A and a saving memory.

Car Audio, Trip Computing, Tire Pressure, FPGA, CPLD, CAN

Description

 CAR AUDIO DEVICE WITH TRIP COMPUTING AND TIRE PRESSURE KEEPING CAPABILITY}

1 is a block diagram showing the configuration of a trip computer according to the prior art;

2 is a conceptual diagram of a car audio device having trip computing and tire pressure management according to a preferred embodiment of the present invention.

3 is a block diagram of a car audio device with trip computing and tire pressure management in accordance with a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: ECU 120: TCU

130: vehicle speed sensor 140: flow sensor

150: trip computer 160: input interface

170: CPU 180: output interface

190: speaker 200: display device

300: car audio device 310: trip computing and tire pressure management unit

320: controller 330: micom

340: flash memory 350: display unit

360: wireless receiver 370: memory for trip computing                 

400: tire pressure sensor

The present invention relates to a car audio device, and more particularly to a car audio device having trip computing and tire pressure management functions.

In recent years, various devices included in automobiles are becoming electronically controlled. For example, the trip computing function is a device that provides information related to driving such as driving distance, speed limit, fuel economy, driving time, driving distance, average speed, outside air speed, and tire pressure of residual fuel.

1 is a block diagram showing the configuration of a trip computer according to the prior art.

As shown in FIG. 1, the trip computer 150 includes a vehicle speed from an engine control unit (ECU) 110, information from a shift control unit 120, speed information from a vehicle speed sensor 130, and a flow sensor 140. Input interface 160 for receiving state data such as fuel amount outputted from the &lt; RTI ID = 0.0 &gt; 1) &lt; / RTI &gt; An output interface unit 180 for outputting an alarm sound to a buzzer or a speaker 190 according to the calculation result of the unit 170, and a display apparatus 200 for displaying vehicle state information output from the central processing unit 170; Consists of The display apparatus 200 may be mounted in the form of a liquid crystal display (LCD) on a dashboard external to the trip computer.

However, since the conventional trip computer requires a considerable amount of computation for calculating the vehicle state information, it is generally implemented as a separate device having a high performance CPU. In addition, in most cases, a display device for displaying information corresponding to trip computing to a driver is separately included. Although it is conceivable to implement some of the above-described trip computing functions using a high-performance CPU embedded in a navigation device, a telematics terminal, etc., the above-mentioned trip computing is limited because the microcomputer provided in a typical car audio device has a limited data throughput. There is a problem that the function is not easy to implement.

Meanwhile, in order to implement a tire pressure management function in a vehicle that does not have a tire pressure management function, it is inconvenient to connect a separate wiring for each tire, so that the tire pressure management function is applied to the above-described trip computing function. It is necessary to prepare a plan to add effectively.

Therefore, there is a growing need for a way to reduce production costs by avoiding the use of redundant hardware and integrating them.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has an object to implement a trip computing function in a simple and cost-effective manner using the hardware of the car audio device, especially in a vehicle that is not equipped with a tire pressure management function The purpose is to effectively add tire pressure management to the function.

In order to achieve the above object, according to one aspect of the invention there is provided a car audio device that is connected to the CAN network of the vehicle and receives the tire pressure wirelessly from the tire pressure sensing unit, performs the control of the car audio device and display A microcomputer for outputting information, a display unit for displaying display information output from the microcomputer, a wireless receiver for wirelessly receiving tire pressure from the tire pressure sensor, a state data collected from the CAN network, and the wireless receiver. The trip computing and tire pressure management unit generates vehicle status information based on the tire pressure received from the trip unit, and the vehicle status information output from the trip computing and tire pressure management unit is combined with the display information output from the micom and the display unit. My To a controller, a memory for storing the vehicle status information output from the computing trip and tire pressure management.

In this case, preferably, the controller relays data exchange between the trip computing and tire pressure management unit and the micom, and the trip computing and tire pressure management unit generates the vehicle state information using the micom. At least some may be done.

More preferably, the display information output from the microcomputer may be provided to the display unit via the controller, and the trip computing and tire pressure management unit may be implemented by one chip with CPLD or FPGA.                     

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and the same reference numerals as those of FIG. 1 refer to the same or similar components.

2 illustrates a concept of a car audio device having trip computing and tire pressure management functions according to a preferred embodiment of the present invention.

As shown in FIG. 2, the car audio device 300 according to the present invention is connected to the above-described ECU and / or TCUs 110 and 120, the vehicle speed sensor and / or the flow sensor 130, 140, and these devices. The state data is acquired from the vehicle, and the tire pressure is wirelessly received from the tire pressure detector 400 installed in each tire. The tire pressure detector 400 includes a sensor (not shown) that detects tire pressure, and a wireless transmitter (not shown) that outputs the tire pressure detected by the sensor as a wireless signal.

3 is a block diagram of a car audio device 300 having trip computing and tire pressure management functions according to a preferred embodiment of the present invention.

As shown in FIG. 3, the car audio device 300 having a trip computing and tire pressure management function according to an exemplary embodiment of the present invention may include a trip computing and tire pressure management unit 310, a controller 320, and a controller 320. And a microcomputer 330, a flash memory 340, a display device 350, a wireless receiver 360, and a memory 370. Meanwhile, other components of the car audio device are not shown for convenience of description.

Trip computing and tire pressure management unit 310 is a variety of electronic devices and / or sensors in the vehicle, for example, engine control unit (ECU) 110, shift control unit (TCU) 120, vehicle speed sensor 130, flow sensor The above state data is received from 140 and the like, which is connected to the CAN network through a CAN controller (not shown). On the other hand, the above-described CAN controller may be used in the car audio device. In addition, the trip computing and tire pressure manager 310 is connected to the wireless receiver 360 to receive tire pressure from the tire pressure detector 400.

The trip computing and tire pressure management unit 310 is logically designed in advance for the trip computing function to process the state data received from the above-described CAN network and the tire pressure value received from the wireless receiver 360 to generate vehicle state information. . In the design of the trip computing and tire pressure management unit 310, the amount of calculation and hardware required for the trip computing and tire pressure management unit 310 by programming in advance so as to make maximum use of the calculation function of the microcomputer 330 of the car audio device. Lower requirements.

In this case, by implementing the trip computing and tire pressure management unit 310 as a single chip using a complex programmable logic device (CPLD) or a field programmable gate array (FPGA), the trip computing function may be added / modified as needed.

In connection with the one-chip implemented trip computing and tire pressure management unit 310, a separate circuit board on which the trip computing and tire pressure management unit 310 is mounted is mounted inside a conventional car audio device, and a car audio main board is installed. The input port and the trip computing and tire pressure management unit 310 may be configured to interconnect the output port of the mounted circuit board, in which case other components of the car audio device may be reused in the same manner. Alternatively, a detachable socket for mounting the one-chip trip computing and tire pressure management unit 310 may be provided on the main board of the car audio device, and thus may be selectively implemented according to the necessity of the trip computing function. .

The controller 320 performs a function of relaying data exchange between various components in the car audio device 300. For example, the vehicle state information calculated by the trip computing and tire pressure management unit 310 may be provided to the microcomputer 330 to be output to the display device 350 or may be directly provided to the display device 350.

When the vehicle state information calculated from the trip computing and tire pressure manager 310 is directly transmitted to the display apparatus 350, the image information output from the display apparatus 350 is calculated from the trip computing and tire pressure manager 310. It can be configured to insert the vehicle status information.

In addition, the controller 320 may access the flash memory 340 by the trip computing and tire pressure manager 310 to store data required in the calculation process or vehicle state information calculated therefrom in the flash memory 340. And / or make withdrawals. The trip computing and tire pressure management unit 310 relays the data exchange between the trip computing and tire pressure management unit 310 and the microcomputer 330 to calculate the vehicle state information using the microcomputer 330. Allow at least some of the operations to be performed.

The microcomputer 330 performs data control and control of various components (eg, a tuner deck, a CDP deck, etc.) including the display device 350, as provided in a typical car audio device.

In a preferred embodiment of the present invention, the microcomputer 330 controls the display device 350 to receive the information output from the trip computing and tire pressure management unit 310 to display on the predetermined screen area of the display device 350. It is desirable to.

The flash memory 340 may store data that is accessed and required by the microcomputer 330, and may store and / or retrieve data and / or vehicle state information required by the trip computing and tire pressure management unit 310. .

The display device 350 may use the same as that provided in the conventional car audio device, and receives the vehicle state information as the trip computing result from the microcomputer 330 and / or the trip computing and tire pressure management unit 310 to the driver. I can display it. Vehicle status information as a result of trip computing may be displayed on a predetermined area of the display apparatus 350, and a front panel of the car audio apparatus 300 may include a button for controlling the display of vehicle status information using trip computing. Can be configured to turn the display on and off.

As described above, the wireless receiver 360 receives the tire pressure wirelessly transmitted from the tire pressure sensor 400 and provides the tire pressure to the trip computing and tire pressure manager 360.

The memory 370 is connected to the trip computing and tire pressure management unit 360, and receives and stores various state data (including tire pressure) from the trip computing and tire pressure management unit 360, or the trip computing operation of the trip computing and tire pressure management unit 360. Temporary data may be stored at the time, or vehicle state information generated as a result of the trip computing may be stored. Since the function of the memory 370 may be replaced by the flash memory 340 described above, it may be selectively installed and utilized when the capacity of the flash memory 340 mounted on the car audio is insufficient.

Although the preferred embodiment according to the present invention has been described above, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the protection scope of the present invention should be defined by the following claims.

As described above, according to the present invention, the trip computing function can be easily and cost-effectively implemented by using the hardware of the car audio device, and the tire pressure management function is included in the trip computing function, especially in a vehicle without the tire pressure management function. There is an advantage that can be added effectively.

Claims (4)

Car audio device connected to the vehicle's CAN network and wirelessly receives tire pressure from the tire pressure sensor. A microcomputer that performs control of the car audio device and outputs display information; A display unit which displays display information output from the microcomputer; A wireless receiver configured to wirelessly receive tire pressure from the tire pressure detector; A trip computing and tire pressure management unit generating vehicle state information based on the state data collected from the CAN network and the tire pressure received from the wireless receiver; A controller which combines vehicle state information output from the trip computing and tire pressure management unit with display information output from the microcomputer and provides the display unit to the display unit; Memory for storing the vehicle state information output from the trip computing and tire pressure management unit Car audio device having a trip computing and tire pressure management function comprising a. The method of claim 1, The controller relays data exchange between the trip computing and tire pressure management unit and the microcomputer, And the trip computing and tire pressure management unit performs at least a part of the operation of generating the vehicle state information using the microcomputer. The method according to claim 1 or 2, And display information output from the microcomputer is provided to the display unit via the controller. The car audio device according to claim 1 or 2, wherein the trip computing and tire pressure management unit is implemented by one chip with CPLD or FPGA.

Images